Fire-extinguisher



(No Model.) W. H. DURANT.

FIRE EXTINGUISHER.

No. 376,239. Patented Jan. 10, 1888.

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WITNESSES N. PETERS, Phnln-Lithugraphar, Wnmmgwn. 0.1;

UNITED STATES ATENT Diaries.

WILLIAM HOAR DURANT, OF CONCORD, NEW HAMPSHIRE.

FlRE EXTINGUlSHER.

SPECIFICATION forming part of Letters Patent Nov 376,239, dated January 1 O, 1888.

Application filed June 29, 1887. Serial No 242.876. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM HOAR DU- RANT, of Concord, in the county of Merrimack and State of New Hampshire, have invented a new and Improved Fire-Extinguisher,ofwhich the following is a new, clear, and exact description.

The object of my invention is to provide a new and improved lire-extinguisher for instant-- ly extinguishing the fire in a car-heater when the car is upset by a collision or other accident.

The invention consists of a tank containing, a solution of bicarbonate of soda dissolved in water, said tank being provided with a valve in its bottom leading to pipes connected with the interior of the car-heater, and ofa small vessel turning on trunnions inside of the tank and containing sulphuric acid, which, when emptied into the bicarbonate of soda, produces carbonic-acid gas.

The invention consists in the construction and arrangement of certain parts and details, and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims. Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure l is a sectional side elevation of my improvement, and Fig. 2 is a sectional plan view ofpart ofthe same on the linemxofFig. 1.

The tank A, of suitable dimensions and ma terial, islocated in the neighborhood of the carheatcr in a car, and is about one-half filled with a solution of bicarbonate of soda, dissolved in water. From the bottom of the tank A extends a tube, B, inthe side of which is held a valve, G, connecting said tube B with the tube D, provided with the pipes E and E, leading into the interior of the car-heater, above and below the grate-bars.

The valve 0 is provided with a valve-stem,

. 0', having its bearing in a nut, F, screwing into the tube D, and against the outer pointed end of the valve-stem 0 press the ends of springs G, secured to said nut F. The ends of the springs G abut against each other, so that the pointed end of the stem 0 receives an inward pressure from said springs, thus holding the valve Gin its seat on the tubeB. The

outer parts of the valvestem O'and the springs G are inclosed in a cap, H, screwing on said nut F.

To the upper end of the tank A are secured the inwardly and downwardly projecting rods I, in the lower ends of which are held, to turn, the trunnions J, secured at opposite points to the small vessel K, containing sulphuric acid. The mouth of the vessel K is closed by a stopper, L, hung by a chain, N, secured to the cross-piece O, fastened to the interior of the tank A, near its upper end. The mouth of the tank A is closed by a cap, P. V

The operation is as follows: \Vhen my improvement is in the position shown in Fig. 1, the bicarbonate of soda is held in the tank A as long as the valve G closes the opening in the tube B, and said valve 0 is held in place by the springs G.

If the car in which my improvement is 10- cated is upset by a collision or other accident, the small vessel K will turn on its trunnions J,

so that thestopper L, hung on the chain N, will be drawn from theniouth of said vessel K, and the contents of the vessel will be emptied into the bicarbonate of soda, so as to produce carbonic acid gas. The pressure of the latter forces the valve 0 outward, so that the carbonic-acid gas will pass from the tank A, through the tube B, into the tube D, and from the latter, through the pipes E and E, into the ing from the lower end of said tank and pro vided with pipes leading to the interior of the car-heatcr,andavalveheldinsaidtubeand connecting the latter with the interior of the tank, of a small vessel hung on trunnions in the interior of said tank above said solution of bicarbonate of soda and water, said small vessel into said solution in the tank, so as to produce containing sulphuric acid, and a stopper closcarbonic-acid gas, and a stopper held on the ing the mouth of said small vessel and hung on mouth of said small vessel and hung on a chain [5 a chain secured to the upper end of said tank, secured to the upper end of the said tank, so substantially as shown and described. that whensaid vessel turns on its trunnions the 2. In a fire-extinguisher, the combination, stopper is removed from the mouth ofsaid veswith a tank containing a solution of bicarbonsel, substantially as shown and described. ate of soda in water, of a small vessel hung on a T trunnious in said tank above said solution of VILLIAM HOAR DURAB bicarbonate of soda and water, said small vcs- \Vitnesses: sel containing sulphuric acid,which,when said J. P. TITCOMB, tank assumes an inclined position, is emptied M. I. 003213. 

